Abrading wheel sheet and sheet holder



3, H. w. DEMPSEY ABRADING WHEEL SHEET AND SHEET HOLDER Original Filed July 11, 1936 A: w u I Hm! :wli!

Patented May 3, 1938 XUNITED' STATES ABRADING wn EL SHEET AND SHEET HOLDER Harry W. Dempsey, Charlotte, Mich=., assignor of one-half toHarry F. Hittle, Lansing, Mich.

Applicati'on July I1, 1936, Serial No. 90,227

- Renewed March 26, I937 i 13 ciannsf (01.51497) construction of the wheel or body member, as

Well as the form of the single or divided sheet employed; and the peculiar means for securing the 16 sheet or sheets and the body or wheel.

By means of the accompanying drawing the special construction and arrangement of the essential parts are illustrated.

Fig. 1 represents the form of the sheets and shows two half sheets arranged together in overlapping relation.

Fig. 2 shows the form on one half sheet.

Fig. 3 is a diametrical sectional view of a wheel made of rubber and shows the means for attaching the sheet. V

' Fig. 4 rep-resents an edgewise view of the wheel with two overlapping half sheets attached showing the meansforsecuring the adjoining edge ex tensions of the divide'dsheets.

same number isjemployed to refer to the same part.

Considering the drawing, a half sheet I' is shownwith its straight edge parallel with a diameter of the sheet overlapping a like sheet 2. Each sheet is constructed with the spaced peripheral lugs or extensions 3 provided with the slots 4 extending radially with respect to the center of the sheet. It is not intended to limit this inyention to the precise form or size of sheet, or of the material of which the sheets are formed. The

sheets are ordinarily sandpaper, but any polishing or cleaning fabric may be used.

Considering Fig. 3, the wheel body 6 is usually of solid rubber as illustrated, but any material such as felt or fabric may be used, and the wheel may be made of separable portions. The wheel is provided with a central shaft 1, which may be connected with a crank for hand operation, or

supported in any form of bearings desired and connected with any suitable power source. In

Fig. 3 a single sheet 8 is shown, having the same peripheral formations as sheets I and 2 described as half sheets. The peripheral extensions 9 of sheet 8 are inserted in splits l0 made in the rim of the wheel 6 and normally elastically closed.

The splits may be of any necessary depth and located apart in correspondence with the positions of the lugs 9. Embedded in the rubber body at each split is a pin I I, adapted to be passed Throughout the drawing and description: the

through the'slot in the extension of the sheet, but obviously a pointed pin may be employed that will pierce the extension in assembling the parts. In Fig. 3 is shown a central shaft or spindle l, and on the shaft is an adjustable clamping plate 12 at the rear of the wheel. Lo-' catedwithin a. central recess 6 in the front or abrading face of the wheel is a cushion l3 or rubber frictionally engaging and serving as a yieldablebacker for the sheet or sheets upon the wheel. This cushion I3 is held in the recess 6 'in the wheel body 6, and the latter is held upon the'shaft 1 by means of a hollow nut I4 and the clamping plate l2. As shown, the nut I4 is practically imbedded in the cushion threadedly engages the shaft at its outer end in spaced relation to the sheet 8, thus there is no danger of the nut l4 damaging the surface being abraded by said sheet. This especial arrangement may be varied and include any common devices for the purpose. 20

1 Each half sheet I and 2 is formed with extensions such as the lugs l5 and I6 at the dividing line, and in Fig. 4 the securing pins l1 and I8 are shown engaging the lugs I5 and l6.

In operation, the sheet or sheets are spread upon the sanding face of the wheel body and secured by inserting the lugs into the splits and passing the pins through the slots in the lugs.

The center of the sheet or sheets is clamped b the washer and clamping plate on the shaft. The rubber wheel because of its flexibleness will permit the sanding of what is commonly termed square c'or'n'ers. As stated hereinabove, the wheel may be hand operated or power driven,and the 35' wheel body and. sheets may be made in any desired size, quality, or material.

Having now described this invention, and the manner of its use, I claim:--

1. A circular body of yielding material having 40 peripheral split portions extending in a circumferential direction, in combination with a sheet provided with edge portions adapted to be inserted in the said splits of the wheel, the said wheel body having pins located in said splits and adapted to be passed through the said inserted edge portions of the sheet.

2. A circular body of yielding material having peripheral split portions, in combination with a 50 sheet provided with edge portions adapted to be inserted in the said splits of the said body, said edge portions having openings therein, the said body having pins located in the said splits and adapted to be passed through the said openings 55 PATENT OFFICE l3 and 5- in the said edge portions of the sheet to secure the sheet.

3. A circular body of the character of a wheel, said body having elastic split portions, in combination with a sheet having its edge portion adapted to be inserted into said splits of the body and provided with spaced openings, and the said body having pins in said splits correspondingly spaced with respect to said openings in the sheet and adapted to be passed through said openings to secure the sheet.

4. A circular body of resilient material having spaced peripheral splits, in combination with a plurality of sheets, each sheet having edge portions adapted to be inserted into said splits of the body, and said body having pins located in said splits constructed and arranged to be passed v through said inserted portions of the sheets to hold the sheets.

5. A circular body of resilient material having spaced peripheral splits, in combination with a plurality of sheets, each sheet having edge portions adapted to be inserted into the said splitsv of the body, the said sheets having portions arranged one over the other upon the said body, and said body having pins located in the splits constructed and arranged to be passed through said inserted portions of the sheets to hold the sheets. I i

6. A circular body of resilient material having spaced peripheral splits, a shaft extending centrally through the said body, in combination with a sheet having its edge portions adapted to be inserted into the said splits of the body, said body having pins located in the splits constructed and arranged to be passed through the said inserted portions of the sheet to hold the sheet, and means engaging the end of said shaft for clamping the sheet and wheel centrally upon the shaft.

7. A circular body of the character of a wheel composed of rubber and having peripheral split portions constructed to be elasticallyopened, in combination with a sheet provided with edge portions adapted to be inserted into the said splits of the wheel, the said wheel having means located in the said split portions and adapted to engage the said edge portions of the sheet to secure the sheet upon the wheel in detachable relation.

8. A device of the class described, comprising a sheet of abrasive material having radially extending attaching means, a circular supporting body of resilient material having one face forming a seat for said sheet and provided in its periphery with a circumferentially extending slit for the reception of said attaching means, and means imbedded within said body adjacent said slit for holding said attaching means.

9. A device of the class described comprising a circular body of resilient material provided in its periphery with a circumferentially extending slit, and a sheet of abrasive material upon one face of said body and having attaching means anchored within said circumferentially extending slit.

10.,A device of the class described comprising a circular body of resilient material provided in its periphery with a circumferentially extending slit, a sheet of abrasive material upon one face of said body and having radially extending attaching portions extending within said circumferentially extending slit, and means carried by the body adjacent said slit for holding said attaching portions.

11. A, device of the class described comprising in its periphery with a circumferentially extend- 1 ing slit, and a sheet of abrasive material extending over one face of said disk-like body and having radially extending attaching portions anchored within said circumferentially extending slit.

12. A device of the class described comprising a disk-like body of resilient material provided in its periphery with a circumferentially extending slit and having a recess in its outer face at substantially the center thereof, a sheet of abrasive material extending over said outer face and having attaching portions anchored within said circumferentially extending slit, and a cushion of resilient material anchored within said recess frictionally engaging the center of said sheet and serving to maintain the latter taut from the attaching portions anchored within said circumferentially extending slit.

13. A device of the class described comprising a disk-like body of resilient material provided in its periphery with a circumferentially extending slit and having a substantially frusto-conical recess in its outer face at substantially the center thereof, a sheet of abrasive material extending over said outer face and havingattaching portions anchored within said circumferentially extending slit, a cushion of resilient material substantially filling said frusto-conical recess frictionally engaging the center of said sheet and serving to maintain the latter taut, a supporting shaft for the disk-like body having an end thereof within said central recess, and means for holding the cushion within the recess and for holding the body on the shaft including a clamping element on the end aforesaid of the shaft between the cushion and sheet.

HARRY W. DEMIPSEY. 

